Drivabilty vs. Performance help newbie

New here i just picked up member Giggys car and love it heres the basics

340 .030 over (lower end built up by Best Machine)
KB243 .030 pistons 10.2 compression
Edelebrock Aluminum Heads
Edelbrock 1407 750 cfm carb
Straightline Performance cam .540/525 lift and 234/246 [email protected]
LSA 112 , degree to intake lobe 108
Indy Adjustable Rockers

Mopar electronic ignition with Hi-Performance Coil
TTI nickel plated headers
TTI full dual exhaust to chrome tips
Dynomax Super Turbo Mufflers
Espo 2" overstock leaf springs
904 street/strip transmission built by Klem Racing
Turbo Action 3500 rpm stall converter
8 3/4 3.91 rear
P275/60R15 & P215/70R14 BFG Radials on Cragar SS chrome wheels
High volume oil pump
Aluminum radiator

Looking for more streetablity out of it , and wondering which way to go go Smaller cam ? Lower stall ? or both ? and subsequently higher gears necessary to match?

If i could get away with a lower stall and gears and leaving the cam im fine with that if the cam will behave with a lower stall. Considering a TCI 2400-2600 stall ? Currently the car hates going in Reverse esp when cold. and has some idle issues at a stop. I would like to take the car to the Nats next weekend (200 miles of freeway ea way)so looking for some help. I see alot of similar combos and just wondering what your guys experience are like as far as streetability. Would the cam behave alot better with a lower stall or would i just max the issue worse with not enough stall. Also considering either 3.23 w 27in tall tire or 3.55 with the 28'. Not looking for a highway cruiser but i know the current setup inst gonna be friendly as id like and the rear needs to be addressed anyway.

If you think i need to ditch the cam how about a Hughes2328
specs: lift w 1.5 ratio 506/524 , duration @ .050 223/228 LSA 111+3

or one smaller 489/524 219/228 ??

any help would be great !